Leases, Used Cars, and Refinancing: What the Car Loan Deduction Covers

The three questions everyone asks after hearing about the $10,000 deduction, answered one at a time.

Leases: no

A lease payment contains finance charges that feel like interest, but the law is specific. The deduction applies to interest on a loan used to buy the vehicle, secured by the vehicle. A lease is not a purchase and there is no loan, so nothing in a lease payment qualifies. If you do a lease buyout, the loan you take to buy the car at the end can qualify going forward, provided the car still meets the other tests, and the new car test is the problem, because by buyout time it is a used car.

Used cars: no

The vehicle must be new, meaning you are its first owner and its original use starts with you. A certified pre owned car does not count, a one year old car with 8,000 miles does not count, and a dealer demo is a judgment call best confirmed with your dealer paperwork. The purchase also must have happened after December 31, 2024, and final assembly must have been in the US, which you can confirm in seconds with our free VIN checker.

Refinancing: mostly yes

This is the friendliest rule of the three. If your original loan qualified and you refinance it, the interest on the new loan keeps qualifying, but only up to the amount you still owed when you refinanced. Refinance $28,000 of remaining balance and the interest on that $28,000 qualifies. Roll in an extra $5,000 of cash out and the interest on that extra slice does not. Keep your refinance paperwork so the split is easy at filing time.

The rest of the rules in one breath

Personal use only, loan secured by the car, cap of $10,000 of interest a year, income phase out starting at $100,000 single and $200,000 married, and you must list the VIN on your return. The deduction runs for tax years 2025 through 2028.

Check your car, then your savings

The car loan deduction calculator checks your VIN against the official government database and estimates your actual tax savings in the same minute. Free, no signup.

Rules summarized from the 2025 law and IRS guidance as of 2026. Edge cases like lease buyouts and dealer demos are worth confirming with a tax professional. This is general information, not tax advice.